Product Overview
Duplex Steel Plate is engineered for high-performance industrial applications requiring exceptional mechanical strength and superior corrosion resistance. Compared to conventional austenitic stainless steel, duplex grades provide double the yield strength along with advanced resistance to pitting, crevice corrosion, and chloride stress corrosion cracking.
This product line supports heavy-duty fabrication, pressure equipment, and marine structures where extended service life, minimal maintenance, and reliable welding integrity are mandatory. Standard stock includes 2205 Duplex and 2507 Super Duplex stainless steel plates for medium to severe corrosive environments.
Grades & Supply Range
UNS S31803 / S32205 / EN 1.4462 – Duplex 2205 (Standard Grade)
UNS S32750 / EN 1.4410 – Super Duplex 2507 (Severe Service)
UNS S32760 – Super Duplex for highly aggressive chloride environments
Main Standards: ASTM A240 / ASME SA240 / EN 10088-2
Technical Specifications
|
Parameter |
Duplex Steel Plate Supply Range |
|
Product Form |
Hot Rolled Plate, Sheet, Cut-to-Size Blanks, Strips |
|
Grades Available |
S31803, S32205, S32750, S32760 |
|
Thickness Range |
3 mm – 100 mm |
|
Width Options |
1000 mm, 1250 mm, 1500 mm, 2000 mm, 2500 mm |
|
Length Options |
2000 mm to 12000 mm (Custom lengths available) |
|
Delivery Condition |
Solution Annealed, Water Quenched, Pickled |
|
Surface Finish |
No.1, 1D, 2B, Laser-Cut, Finished Machined |
|
Compliance Standard |
ASTM A240, ASME SA240, EN Specifications |
|
Certification |
MTC EN 10204 3.1 / 3.2 Traceability |
|
Value-Added Service |
Precision cutting, leveling, edge trimming, beveling, drilling |
Key Performance Advantages
Weight Optimization via High Yield Strength: The dual-phase microstructure delivers higher strength than standard stainless steel, enabling wall-thickness reduction and significant material weight savings.
Excellent Chloride Resistance: Outstanding defense against localized pitting, crevice attacks, and stress corrosion cracking in seawater and marine environments.
Reliable Weldability & Fabrication: Excellent structural integrity and low thermal expansion make it ideal for heavy-gauge welding, vessel forming, and structural fabrication.
Maximum Lifecycle Cost Efficiency: Lower nickel and molybdenum content compared to high-alloy austenitic grades provides price stability and reduced long-term maintenance costs.
Typical Applications
- Offshore oil and gas platforms, subsea piping, and structural components
- Seawater desalination systems, reverse osmosis units, and high-pressure pumps
- ASME pressure vessels, chemical storage tanks, and process columns
- Shell and tube heat exchangers, evaporators, and condenser tubing
- Marine chemical tankers, cargo holds, and fluid handling systems
- Pulp and paper processing digesters, bleaching equipment, and liquor tanks
- Industrial flue gas desulfurization scrubbers and clean energy systems
Surface Condition & Processing Options
To accelerate project timelines, all plates can be supplied fully processed and ready for assembly:
Quality Control & Certifications
Every shipment undergoes rigorous testing to ensure full compliance with international engineering codes. Traceable documentation includes:
- Raw material heat number verification and mill heat traceability
- Independent chemical analysis and spectral verification
- Tensile, yield, elongation, and impact testing
- Positive Material Identification and ultrasonic testing
- Dimensional precision and surface flatness checks
Global Certifications Supported: CE, ISO 9001, PED 2014/68/EU, GOST, TS, and MA
Packaging & Shipping
Export-grade packaging ensures complete surface protection during international ocean transit, air freight, and inland logistics:
- Reinforced steel or fumigated wooden pallets tailored for heavy plates
- Heavy-duty moisture-proof wrapping and protective plastic covers
- High-strength steel strapping with heavy-duty edge and corner guards
- Permanent stenciling of grade, size, heat number, and purchase order tracking
- Optimized container loading, flat rack securing, and breakbulk shipping coordination
FAQ
Q: What is the most common duplex plate grade for industrial use?
A: UNS S32205 / S31803 (Duplex 2205) is the most widely specified grade, covering the vast majority of general chemical processing and marine engineering needs.
Q: When should Super Duplex 2507 be selected over Duplex 2205?
A: Super Duplex 2507 (UNS S32750 / S32760) is required for extreme chloride environments with higher temperatures, where superior pitting resistance (PREN > 40) is essential.
Q: Are these duplex plates certified for ASME pressure vessel fabrication?
A: Yes. Our plates are fully compliant with ASTM A240 and ASME SA240 standards, making them approved for pressure equipment, storage tanks, and boilers.
Q: Do you provide custom-sized plates and semi-finished components?
A: Yes. We offer comprehensive value-added processing including precise CNC profile cutting, custom lengths, edge beveling, and drawing-based drilling services.
Q: What documentation accompanies the delivery of Duplex Steel Plates?
A: Every delivery includes an authentic Material Test Certificate conforming to EN 10204 3.1, complete with heat numbers, chemical analysis, and mechanical test data.
Q: Which global industries rely most heavily on duplex plate solutions?
A: Primary sectors include marine engineering, desalination, oil and gas extraction, chemical storage, pressure equipment manufacturing, and heavy structural infrastructure.
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